Apparatus for boring drifts or shafts



G. F. GOERNEH.

APPARATUS FOR BORING DRIFTS 0R SHAFTS.

APPLICATION HLED llUNE 2,1920.- 4

Patented Apr. 18, 1922.

me Nn y ma G Pff G ArToRNEys therewith for discharging cooling lliquidbe; yneath the boring disc of the apparatus, said.

' borin Umsasm citizen of the United States,.resid.ing atLos Angeles, in thercoun'ty ofLos 'Angeles'and' State of California,

Boring Drifts or Shafts, of which-the4 followin'ggis a specification. y

This inventionv :relates ,to an .apparatus-for drifts -orshafts and the like.' It is the o jectof the invention to provideV an apparatus by means of which a drift,shaft, or the like of full working size'may bebored by a single operation. It is a further object of the invention'fto provide '-,anapparatus of this character having means 'associated liquid also aiding in Working Athe ground material outwardly toward the edge ofthe yboring disc. It isfav still further object of the invention to provide means'. forV withdrawing the ground material as it is cut.

The invention will be readily understood from the following description of the accompanying drawings, in which- Figure 1 is a side elevation of the limproved apparatus in operative position.

Fig. 2 is a Atop plan view of the boring disc.

3 3 of Fig. 2.

Fig. 4 is a transverse 4 4 of Fig. 2.

Fig. 5 is a bottom plan view of the cutter head. Y Fig. 6 is a longitudinal section on the line 6-6 of Fig. 5. The improved boring apparatusconslsts essentially of a rotatable shaft having a boring disc iXed for rotation upon the end thereof, said boring disc being'of the diameter of the finished shaft, drift, or the like. The shaft of the apparatus may be positioned in either a horizontal, vertical or intermediate plane, depending upon where the shaft, or drift and the like is to be bored. It will be understood that a boring disc of section on the line any required diameter may be employed, l

said boring disc being arranged to make a boring the required size ofthe finished work, said boring having the sides thereof in a smooth condition and thereby eliminatingthe usual trimming down of rocks and the like to accommodate the timbers.

In the specific embodiment of the invenv afrontan F. eonanmgo'r Losjaivennns, oALironNrA.. l i' have invented new andy Vuseful Improvements in ApparatusV for APPARATUS non Bonfire nnfrfrs on sHA'FTs.'

Specification of Letters Patent. Pajteylggijl` 192Q;

1920. Serial No. 385,968..v

tion as illustrated I showl the improved site. f

apparatus vboring a shaft-1, the main Vvshaft i of the;apparatusV being shownvat-.2 and the boring vhead atl 3. The main shaft 2 .preferably comprises hollow pipe sections to which sectionswill be added as the work progresses.` AThis main shaft may be'rotated many suitable. manner, shown vin the present instance as comprising a worm driving connection 4 arranged above the `:surface 'level 5.- When the work has progressed to aniappreciable depth one or more bearings vmay be provided in the boring for the main shaft 2, one o f said vbearings being shown at 6 as comprising a spider litting within the boring and forming 'a bearing? forthe main sh aft.

y"The-boring head comprises a' disc which .-1

may be provided upon its rear face with suitable strengthening ribs v8. The* boring disck isprovided withV a through whichV is threadeda hollow vcutting 'head f10'secured upon the endofv the hollow `-main' shaft by the threaded connection 11. "The-'cutting head is preferablyl keyed' to the boring disc as shown said cutting head projectsslightly beyond central opening 9 at- 12 and the end of d the` outersurface of the boring .disc and is provided with an annular cutting end 13 surrounding the hollow interior of the cut?V v Fig. 3 is a transverse sectlon on the line ting head.

Thecutting end 13 is preferably detach.- i

ably connectedto the cutting head 10 Vas by the threaded connectionll, and said cutting end is provided with teeth 13. Al-V ternate ones of said teeth preferably extend substantially parallel to the longitudinalV axis of the cutting end, while the other set of alternate teeth are preferably bent in# wardly so as to meet at the a-Xis of said cut-V ting end, By this arrangement the hollow cutting head'is adapted to permit -of dis-Y chargeof fluid Ytherethrough between the alternate inwardly bent teeth of the cutting Vendwhile said teeth will make an axial borprevent acore beingA formed ing and. thus in the boring made by the apparatus.

iooj

In the form of the invention illustrated in Figs. 2, '3 and 4, the boring' disc is Vprovided at itsV outer surface'with a plurality of radially extending grooves 15 vprovided in. ribs 8 and in 'which'cuttingblades 16 are'arnate blades and grooves 18 and 19 longitudinally of said blades, as clearly shown in Fig. 3, the plane of the cutting edge formed by the blades 16 being slightly in the rear of the plane of the cutting edges formed by the cutting head 10.

VMeans are preferably provided for withdrawing the ground material from the boring, said means being shown as comprising one or more pipes 20 arranged to belet down into the boring with their ends positioned at the edge of the boring disk. These pipes may be connected to any usual or preferred pumping apparatus for withdrawing the ground material past the edge of the boring disc. The pumping apparatus will also withdraw the liquid supplied to the face of the boring disc Ithrough the hollow cutting head, said liquid being adapted to cool the cutting surface of the boring disc, and also to force the ground material from the boring outwardly to the edge of the boring disc so that it may be withdrawn by the pumping apparatus.

The rotation of the boring disc will cause the cutting blades thereof to bore through either earth or rock for forming a boring of the required size, theY cutting head 10 boring out the center of said boring and thereby eliminating coring of the same.

The liquid supplied to the cutting faces through the hollow main shaft and cutting head will cool the grinding surfaces of the apparatus and the suction formed through pipes 20 will withdraw the ground material as well as the said cooling liquid from the boring.

It will be apparent that various changes may be made in` the construction as thus described without departing from the spirit of the invention. l

What is claimed is:

1. A boring apparatus, comprising a hollow rotatable shaft, a boring disc fixed upon said shaft, and a hollow boring head in alinement with said hollow shaft and projecting beyond said boring disc, said boring head having cutting means upon the end thereof.

v2. A boring apparatus, comprising a hollow rotatable shaft, a boring disc fixed upon said shaft, and a hollow boring head in alinement with said hollow shaft and carried by saidboring disc, said boring head having cutting means upon the end thereof, said cutting means being alternately bent inwardly within the longitudinal projection of the .hollow interior of the boring head and the boring head. Y f

3: A boring apparatus, comprising a hollow rotatable shaft, a" boring disc fixed upon said shaft, and a hollow boring head in valinement with said hollow shaft and open at its end, said open end projecting beyond said boring disc.

In testimony whereof I have signed my name to this specification.

GEORGE F. GOERNER.

projected inlongitudin'al alinement beyond 

